DNA and RNA Bases. In DNA, there are four different bases: adenine (A) and guanine (G) are the larger purines. Cytosine (C) and thymine (T) are the smaller pyrimidines.
Gretna is the second-largest city and parish seat of Jefferson Parish, Louisiana, United States. Gretna is on the west bank of the Mississippi River, just east and across the river from uptown New Orleans. It is part of the New Orleans â Metairie â Kenner Metropolitan Statistical Area. The population was 17,736 at the 2010 census.
Grygla, Minnesota. Homefacts City Report. Grygla is located in Marshall County, MN. The population is 229, making Grygla the 8th largest city in Marshall County. There are 2 public schools in Grygla with an average Homefacts rating of C. The total crime rate for Grygla is low, and there are 0 registered sex offenders residing in the city.